16x36x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Cone Filler The first digit indicates the

The first digit indicates the number of tubes (5 = 5-tube unit)

fit the Circulator into the center holes

You can plug the trigger cable into a standard 24-hour timer or environmental controller

cysts and pathogens in the product water

16x36x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Cone Filler The first digit indicates theNordic Pure Custom MERV 8 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition